Sanitary mask



FIG. 1 is a perspective view;

FIG. 2 is a front view;

FIG. 3 is a left side view;

FIG. 4 is a right side view;

FIG. 5 is a back view;

FIG. 6 is a top view; and,

FIG. 7 is a bottom view.

Elements shown in broken lines show portions of the sanitary mask that form no part of the claimed design. 

CLAIM The ornamental design for sanitary mask, as shown and described. 